Electrically-controlled lock.



G. G. BERG. ELEGTRICALLY CONTROLLED LOCK. APPLICATION FILED] APR. 6. 1916.

Patented Apr. 9,

2 SHEETS-SHEET 1- I I20??? aim br'den/ @jezy iy e'ne fssesr GA .GQBERG- ELECTRICALLY CONTROLLED LOCK. APPLICATION FILED-APR. 6. 1916.

1 ,262,35. Patented Apr. 9, 1918.

- 1- M flew To all 'wlwni z't may concern:

GORDEN G. BERG, E CHICAGO, ILLINQIS.

ELEGTRICALLY-CONTBOLLED LOCK.

ful Improvements in l llectrically-Controlled Locks, of which the following is a specification.

This invention relates to improvements in locks and more particularly to a means for controlling from a remote point the conditioning of a door lock whereby it may be positively latched to prevent its manual operation, or may be released to permit such operation. 7

There are many instances where it would be of great advantage to be able, from a remote point, to positively disable several looks, so that they cannot be manually unlocked, and at other times to renderinoperative the disabling means so that the functions of the locks as to their manual control will not 1 nterfered with.

am. aware many types of lock release devices are used on a utment doors and in similar places, but it is to an entirely different arrangement that my invention is'directed. In the usual form of lock release, such as above referred to, the locln ing mechanism is normally set to prevent opening of the door and closing a circuit at a remote point disables the lock and permits the door to be opened, the lock being disabled only while the circuit is maintained closed. In my apparatus as applied to the ordinary handle operated door lock (though it obviously may be applied to many and various other lockin 1 devices) the handle operation of the loot is normally not interfered with, but should it be desirable to lock the handle actuated bolt so that it cannot be operated by the handle, momentary closure of a circuit latches the bolt preventing its movement until released by a subsequent momentary closure of another circuit, permitting the door lock to be actuated by the handle, again.

It is especially in connection with the locks on a plurality of doors entering a single room, as for example a bath room that my invention finds particular usefulness.

Quite frequently a bath room connects ad-.

joining bed rooms and thus has two doors, and perhaps a third opening to a hall. With the present arrangement the pccupant after entering through one door to insure privacy,

specification of Letters Patent. Application file d hpril 6, 1916. Serial No. 893%.

, the latches.

Patented Apr. 9, 191%.

must go to each of the other doors-and turn The advantage of having a, button on the inside of the casing of each door so that on entering the door one may press the lock button and instantly latch all three doors so that they cannot be opened is obvious. On leaving the room by the same, or any other door, the pressure on a release button will disable the latching mechanisms and permit the opening of any of the doors. Whereas there are manyand various associations in which this latching device may be used "to great advantage, 1 have cited merely this one instance as lllllS trative of its application.

The principal ob'ect of my invention therefore is to rovide means for ositively disabling the (001 look when in its locked position by the momentary closure of an electric circuit and means for releasing. the lock by the momentary closure of another circuit. Another object 01 my invention is to provide such an arrangement which maybe readily inserted in .the casing of a door for cooperation with the usual form of bolt action.

Another object of my invention is the to vision of such ap ara'tus in which shrinli we or swelling of tie door or settlin of t e building may be readily and quic' lly compensated for.

Still other and further objects will become readily apparent to those skilled in the art from a consideration of the following description and drawings wherein Figure 1 is a wiring diagram of an installation showing three locks and control stations.

Fig. 2 is a perspective View with parts broken away, showing one form. of latch mechanism and its associated bolt.

Fig. 3 is a vertical sectional view through another form of latch mechanism and bolt showin r two different methods ofcompensating tor shrinkage, swelling or settling of the door or casing.

Fig. 4 is a horizontal sectional view on the line 4-4 of Fig. 3.

Fig. 5 is an enlarged detail view of one of the latch members and its armature with parts broken away.

Fig. 6 is a vertical sectional view on the line 6-6 of Fig. 3.

In both of the modifications of my invention which Ihave illustrated, the apparatus comprises in general a latch pivoted withspring actuated pawl 16. This pawl 16 is in turn capable of being moved into its latch releasing osition by means of a magnet 17. From t e above it will be evident that,

considering the door as closed and the bolt 15 as lying within the aperture 18 in the striker plate 12 momentary energization of the magnet 13 will draw the latch member 10 into engagement with the shoulder 14- in which position it isheld by the spring actuated pawl 16. Under these conditions it is impossible for the bolt 15 to be Withdrawn, and the door is securely locked in this position. When the operator desires to unlatch the bolt, so as to condition it for manual movement, the magnet 17 is energized momentarily moving the pawl 16 out from engagement with the latch 10 which is resilientl moved into its inoperative position. T e door bolt 15 is then free to be turned either by a handle or key. As previously stated this apparatus is particularly adapted for use in connection with bath rooms and the like, where two or three doors can be simultaneously latched or unlatohed from any one of a corresponding number of points. As indicating a simple wiring system for such an installation ll have shown in Fig. 1 a source of current at 19 stepped down through the transformer 20, such as is commonly used for door bell operation, to six or eight volts, across the feed wires 21, 22. As illustrating a typical installation, I have shown three sets of apparatus A, B and C as mounted on three doors of a room. The feed wires 21, 22 and two control wires 23, 24 lead to each installation. The wiring of each set, A, B and C is identical. Magnet 13 is connected by wires 25 and 26 across feed wire 21 and control wire 24:, the othermagnet 17 being connected by means of wires 27 and 28 across the same feed wire 21 and the opposite control wire 23. A pair of push buttons 29 and 30 are both connected at one side by wire 31 to the opposite feed wire 22, the other side of button 29 being connected by wire 32 to control wire 24, and the other side of button 30 connected by wire 33 to control wire 23.

As the wiring connections in each installation are identical, it will be obvious that the closure of the button swit h 29 ill nseaaes cause current to pass from feed wire 22 into control wire 24: from which it passes through each of the magnets 13 at installations A, B and O and back to feed wire 21. On the other hand pressure upon button 30 will connect feed wire .22 in circuit with control wire 24 thus placing the magnets 13 of each setin parallel across feed wires 21 and 22. Referring more particularly to the embodiments of my invention which T have illustrated in the drawings,

Fig. 2 shows a simple form of apparatus in which the casing 11 secured to the rear sition to overlie the upper end of the mag- I not 13. The front end of the latch 10 is hooked downwardly, as at 39, for engagement with the horizontal slot 10 formed in the bolt 15. The formation of the slot 40 provides a shoulder li c, heretofore referred to, against which the hooked end 39 of the latch engages. 1

As it is essential to the operation of my apparatus that the latch after once having been drawn down to locking position by momentary energization of the magnet be held in this position without maintaining a flow of current through the magnet, T have provided a vertical pawl 16 which projects upwardly through an opening in the partition 34 and is pivoted as at 11 on lugs struck up from the partition 34. The upper end of the pawl 16 is provided with a head 42 which is normally pressed into engageits ment with the latch 10 by means of a leaf spring 43. As the latch 10 is moved downwardly under the influence of the magnet the pawl head 12 is spring pressed into engagement therewith, looking it in its downward position. The lower end of the pawl 16 is provided with an armature A t adapted for cooperation with the magnet 17. On

energize-tion of the magnet 17 the armature 44: is drawn to the left swinging the head 42 of the pawl to the right out from engagement with the latch which is thereupon retracted by means of the spring 37 thus freeare ing 50 so that it may be moved outwardly ing ment rotation of Bil or inwardl to compensate for shrinking or swelling 0 the door or casing. To accomplish this I have provided a pair of hollow wood screws 51 taking into apertures in the frame 50 and internally threaded to receive the screws 52, the outer ends of which are flanged to provide heads 53 overlying the outer face of the striker plate, and havshoulders 54 lying a amst the inner face of the striker plate. y this arrangethe screw heads 53 mwardly or outwardly cause the striker plate to move inwardly or outwardly, permitting ilts ready adjustment with respect to the cor.

As a further means for adjustment so as to insure the proper coiiperation between the latch member 10 and the slot 40 of the bolt 15 I have provided an automatic adjustment of the bolt 15 whereby its head will always enter the opening 18 in the striker plate a redetermined distance. This distance is xed by means of a pin or abutment 55 carried by 'he casing 11. The inner end of the bolt 15 is suitably guided as at 56 and slotted, as at 57, to receive a compression sprin I 58, one end of which abuts against the hea 15 of the bolt and the other end of which abuts against a fixed stop 59 within the slot 57. The member 59 is positioned a short distance from the end of the slot 57 so that when the door is opened and the bolt is 'out of engagement with its stop 57 it is permitted toadvancebut a short distance beyond the normal position occupied by it when in engagement with the striker plate. Nith this arrangement the bolt will always advance into the striker.

plate a fixed distance, that is, providing the door is not shrunk so as to space its edge away from the striker plate a distance greater than the space between the stop or abutment 59 and the end of the slot in the bolt.

Referring now to the latch mechanism, shown in Figs. 3 to 6, it will be noted that the latch 10 instead of being pivoted on a horizontal axis, as in the simpler form shown in Fig. 2, is pivoted on a vertical axis 60 so that the hooked end 39' en ages a vertical slot 40"in the bolt 15. This is to permit of a relative vertical movement between the striker plate and the bolt, such as might be caused by settling of the frame. In the present instance I have illustrated a leaf spring 37 as normally holdin. the latch 10 out from engagement wit the slot 40'. The electromagnets 13 are mounted directly upon the bottom of the easing 11 and carry upstanding car like extensions 61 of their poles to permit the movement of the latch armature 38' in a horizontal plane. In the present instance it is ob- Vious that 'the magnet door the automatic latch detent must movement after it has moved into engagement with the slot in the bolt rather than from vertical movement, as in the first instance. For this pur ose I have provided a horizontally dispose detent 16 pivoted as at 41' on a pro ection 41 of the casin. 11. This detent is normall resiliently he (1 in its uppermost )ositionlly means of the coil spring 43', its eaded end 42' bein adapted to automatically engage the latch 10 and hold it in its-bolt latching osition. The detent armature 44' is carried below the detent forcotipe-ration with the upper end of 17. The operation of the improved form, in so far as l have thus far described it, obviously is identical with that of the first described embodiment.

As a further refinement of the invention I have beveled oil the forward nose or end 63 of the bolt head 15 and provided for a resilient extension or elongation of the detent 16 so that in case the o erator should press a button latching the core when one of the doors is open and subsequently close that door, it will automatically lock. Obviously with the embodiment shown in Fig. 2, the

-he enters'open, and thenafter pressing the lock button desire to close the door through which he has entered and lock that. This is possible in the modification shown in Figs. 3 to 6, as the forward end of the bolt head 15 is beveled off, so that after the door is closed, the latch being considered in its locked osition, the beveled 0d" end when impelled orward by the s ring 58 will wedge the hooked end 39' of t e latch 10 to one side, this being permitted by the extensible detent 16, and as soon as the hooked end 39 coincides with the slot 40 in the head, the latch will spring into place and perform its function.

As a simple means of providing for the extensibility of the detent 16' I have provided the headed end section 42' with a tubular opening 64 which telesco me over the pin portion 65 which is ivote as at 41. A spring 4 a is positione within the tubular opening in connected at one end to the pin 65 and at its op )OSltC. end to a pin 62 extending iilllOllf' the head. Obviously the sprin 42 must exert a greater pull on the hea 42 than that exerted by spring 37 when the parts are in latched position. v

' As a precaution against the possibility of an operator leaving the door through which he enters the room open, pressing the lock-- button and subsequently leaving the room through the opened door and shutting lib Mil?

lie

the headed portion 42 and lid it after him, thus looking all of the doors without the presence of anyone in the room, ll have provided a manually operated lock release which can be positioned in conjunction with one of the locks, for example that leadin into the owners room. This'device takes t e form of a push button 70 projecting through the plate 71, and carrying on its inner end a rod 72, the extreme inner end of which is beveled off, for coiiperation with the beveled end 73 of the armature 4A. The button is normally resiliently held in its outermost position by a spring 74:. Pressure on the button 74 causes the beveled end of the pin 72 to engage the beveled end 73 of the armature 4%, depressing the same and releasing the latch member perm1tt1ng the door to be opened.

Whereas T have illustrated and described but two embodiments of my invention it is obvious that various changes might be made therein without departing from the spirit thereof or the scope of the appended claims.

Having described my invention, what I claim is 1. The combination with a door lock bolt having a shoulder formed thereon, of a pivo'tally mounted normally inoperative latch arm having a projection adapted to engage said shoulder when the bolt is in door looking position and hold the same from movement, magnetically actuated means for moving said latch into engagement with the shoulder on the bolt, and releasable means for positively holding the latch in engagement with the bolt.

2. The combination with a door lock bolt having a transverse slot formed therein, of a pivotally mounted normally inoperative latch arm, having a hooked end adapted to engage said slot when the bolt is in door locking position and hold the same from movement, magnetically actuated means for moving said latch into engagement with the slot in the bolt and releasable means for positively holding the latch in engagement with the bolt.

3. The combination with a door lock bolt having a transverse slot formed therein, of a pivotally mounted latch arm having a hooked end adapted to engage said slot when the bolt is in lockin position, resilient means for normally ho ding said latch arm out of engagement with the bolt, magnetically actuated means for moving said latch into engagement with the slot in the bolt, automatic means for engaging and holding said latch in engagementwith the bolt, and magnetically actuated means for moving said automatic means out of engagement with the latch.

d. The combination with a door lock bolt having a transverse slot formed therein, of a pivotally mounted latch arm having a nacaaae hooked end adapted to engage the slot when the bolt is in door locking position, a spring for resiliently holding said latch in its inoperative position, an electromagnet adapted on the momentary energization thereof to move the latch into on 'agement with the slot in the bolt, a pivota ly mounted spring pressed arm having a shoulder formed thereon for engagement with the latch to hold the same in its bolt engaging position, and an electromagnet adapted on the momentary energization thereof to move the spring 1pressed arm out from engagement with the atc 5. The combination with a door lock bolt having a vertical slot formed in one of its vertical faces, of a pivotally mounted latch arm having a hook 'endadapted to engage saidslot when the bolt is in door locking position, resilient means for normally holding the latch arm out of engagement with the bolt, magnetically actuated means for moving said latch arm into engagement With the bolt, and releasable means for holding the latch in engagement with the slot in the bolt.

6. The combination with a door lock bolt having a transverse slot formed in a vertical face thereof, the slotted vertical face of the bolt from the edge of the slot to its end being beveled, a pivotally mounted latch arm having a hook end adapted for engagement with the slot when the bolt is in door looking position, magnetically actuated means for moving said latch into engagement with the slot in the bolt, and means for resiliently holding the latch in engagement with the slot in the bolt.

7. The combination with a door lock bolt having a transverse slot formed in a vertical face thereof, the slotted vertical face of the bolt from the edge of the slot to its end being beveled, a pivotally mounted latch arm having a hook end adapted for engagement with the slot when the bolt is in door looking position, magnetically actuated means lit) for moving said latch into engagement with the slot in the bolt, means for resiliently holding the latch in engagement with the slot in the bolt and'ma'gnetically actuated means for releasing said latch holding means. v

8. The combination with a door lock bolt having a transverse slot formed therein, of a pivotally mounted normally inoperative latch arm, having a hooked end adapted to engage said slot when the bolt is in door locking position,

ment with the slot in the bolt, releasable means for holding the latch in engagement with the bolt, resilient means for extending the bolt into door locking position, and a bolt engaging stop associated with the latch magnetically actuated means for moving said latch into engage ing mechanism to insure registry 10f the ment with the shoulder on the bolt, and relatch with the slot. leasable means for positively holding the l 9. The combination with a door lock bolt latch in engagement with the bolt. having a shoulder formed in a vertical face I In testimony whereof I hereunto set my 5 thereof, of a pivotally mounted normally inhand in the presence of two subscribing 15 operative latch arm having' a projection witnesses.

adapted to engage said shoulder when the GORDEN G. BERG. bolt is in door locking position and hold the In the presence ofsame from movement, magnetically actuated STANLEY W. CooK,

e means for moving said latch into engtge- MARY F. ALIJEN- 

